As the 1972 Election Approached, the Biggest Threat to Nixon's

As the 1972 election approached, the biggest threat to Nixon's reelection seemed to be

A) George Wallace's potential to drain away conservative votes from the Republicans.
B) the massive popularity of Democratic nominee George McGovern.
C) public disapproval of Nixon's efforts to ease tensions with the Chinese and the Russians.
D) revelations concerning the Watergate break-in.
E) the continuing appeal of 1960s-style social liberalism.